PHILADELPHIA - The Third Circuit U.S. Court of Appeals on July 14 affirmed the dismissal of three fen-phen heart valve injury cases, finding that the plaintiffs failed to rebut contrary opinions by two cardiologists who audited their claims and said the diet drug multidistrict litigation court did not "rubber stamp" the finding of a cardiologist appointed as a technical adviser to the court (In Re: Diet Drugs [Phentermine/Fenfluramine/Dexfenfluramine] Products Liability Litigation, Nos. 13-4548, 13-4730 and 13-4731, 3rd Cir.).